Abstract

This work focuses on the creation of a refined workflow for 4D seismic modelling using compositional fluid flow simulation on the synthetic reservoir CERENA-I, which mimics some characteristics of a real Brazilian Pre-Salt field. This reservoir has a saturated oil leg with a retrograde condensation gas cap, both with a high content of CO2, for which a production strategy capable of dealing with large quantities of gas was required and developed.

A rock physics model was built for this reservoir in order to compute time-lapse seismic reflection data with data retrieved from the compositional fluid flow simulation. This allowed assessing the influence of pore fluid changes in the seismic response of the reservoir and the creation of a dataset of time-lapse seismic volumes correlated with a production strategy, which can later be used in multiple seismic inversion studies.

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